unity__添加NPC名字和血条

欢迎大家关注我的日志，今天介绍下添加NPC名字和血条

 //主摄像机对象 
private Camera camera; 
//NPC名称 
public string name; 

//主角对象 
GameObject hero; 
//NPC模型高度 
float npcHeight; 

//默认NPC血值 
private int HP = 100; 

void Start () 
{ 
//得到主角对象 
hero = this.gameObject; 
//得到摄像机对象 
camera = Camera.main; 

//得到模型原始高度 
float size_y = collider.bounds.size.y; 
//得到模型缩放比例 
float scal_y = transform.localScale.y; 
//它们的乘积就是高度 
npcHeight = (size_y *scal_y) ; 

} 

void OnGUI() 
{ 
//得到NPC头顶在3D世界中的坐标 
//默认NPC坐标点在脚底下，所以这里加上npcHeight它模型的高度即可 
Vector3 worldPosition = new Vector3 (transform.position.x , transform.position.y + npcHeight,transform.position.z); 
//根据NPC头顶的3D坐标换算成它在2D屏幕中的坐标 
Vector2 position = camera.WorldToScreenPoint(worldPosition); 
//得到真实NPC头顶的2D坐标 
position = new Vector2 (position.x, Screen.height - position.y); 

//计算NPC名称的宽高 
Vector2 nameSize = GUI.skin.label.CalcSize (new GUIContent(this.name)); 
//根据tag设置显示颜色 
if (this.tag == "green") 
GUI.color = Color.green; 
else if(this.tag == "red") 
GUI.color = Color.red; 
GUI.skin.label.fontSize = 18;//字体大小 
//绘制NPC名称 
GUI.Label(new Rect(position.x - (nameSize.x/2),position.y - nameSize.y ,nameSize.x,nameSize.y), name); 

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